Principal Infrastructure Engineer

Key Responsibilities Serve as the principal technical lead for IBM Z, IBM Power, enterprise storage, and SAN architecture, establishing technical direction, engineering standards, and best practices. Lead critical infrastructure initiatives, including platform upgrades, technology refreshes, capacity expansions, migrations, lifecycle planning, and major configuration changes. Engineer and support IBM Z and IBM Power environments, including HMC/SE management, LPAR configuration, processor and memory planning, and capacity management. Design and operate enterprise storage platforms, including IBM DS8000, IBM FlashSystem, Dell Data Domain, and IBM TS7700, with a focus on performance, availability, replication, and optimization. Own SAN, FICON, and mainframe I/O engineering, including Brocade/Cisco directors, fabric design, zoning, pathing, redundancy, IOGEN/I/O configuration, and complex troubleshooting. Establish and maintain engineering standards, runbooks, controls, and configuration baselines, ensuring infrastructure changes and documentation are accurate, controlled, and audit-ready. Provide technical leadership and mentorship while leveraging automation and AI-assisted engineering to improve incident triage, analysis, change-risk management, documentation, and operational efficiency. Required Skills and Experience 10+ years of hands-on enterprise infrastructure engineering experience, with significant depth in IBM Z / System z, enterprise storage, and SAN environments. Deep expertise with IBM Z hardware and IBM DS8000, including configuration, capacity, performance, availability, and platform operations. Strong experience with SAN technologies, including Brocade and Cisco directors, fabric architecture, zoning, FICON connectivity, redundancy, and multi-fabric troubleshooting. Hands-on experience with IOGEN / mainframe I/O configuration, disciplined change execution, and complex infrastructure dependency management. Experience with IBM FlashSystem, IBM Power Systems, and Dell Data Domain, including platform engineering, storage configuration, and operations. Strong knowledge of storage replication, networking, capacity management, data segmentation, and infrastructure resiliency, including their impact on performance and operational controls. Proven principal-level technical leadership, with strong troubleshooting, communication, documentation, automation, and AI-assisted engineering skills and the ability to lead complex, cross-functional initiatives. Preferred Qualifications Experience with large-scale multi-site IBM Z / storage environments and complex SAN topologies. Vendor certifications or equivalent depth in IBM Z, IBM storage, SAN (Brocade/Cisco), or IBM Power. Experience integrating infrastructure telemetry into monitoring/alerting platforms and building actionable operational dashboards. Experience modernizing operational practices (standardized change patterns, configuration baselines, automated validation, post-change monitoring).